EP1291824A1 - Système et méthode d'avertissement pour un véhicule - Google Patents

Système et méthode d'avertissement pour un véhicule Download PDF

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Publication number
EP1291824A1
EP1291824A1 EP02078140A EP02078140A EP1291824A1 EP 1291824 A1 EP1291824 A1 EP 1291824A1 EP 02078140 A EP02078140 A EP 02078140A EP 02078140 A EP02078140 A EP 02078140A EP 1291824 A1 EP1291824 A1 EP 1291824A1
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EP
European Patent Office
Prior art keywords
vehicle
location
determined
onboard
automotive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02078140A
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German (de)
English (en)
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EP1291824B1 (fr
Inventor
Thomas S Miller Jr.
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Delphi Technologies Inc
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Delphi Technologies Inc
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Publication date
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Publication of EP1291824A1 publication Critical patent/EP1291824A1/fr
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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network

Definitions

  • the present invention relates generally to vehicles, and more particularly to a vehicle warning system and method.
  • Drivers of automotive vehicles are warned of travel conditions such as traffic jams and icy roads by a number of known methods.
  • a driver calls a local radio station on a car cell phone to report a traffic jam or a patch of ice at a particular roadway location.
  • the local radio station then broadcasts this traffic news to all drivers having car radios tuned in to that station so that all such drivers are warned ahead of time of the impending traffic jam or icy patch.
  • a radio reporter in an airborne traffic helicopter sees a traffic jam and reports this traffic news on air over a local radio station broadcast.
  • observed traffic jams and icy roads will be reported to a service, such as the OnStar Virtual Advisor service which uses an automobile's Global Positioning System to determine an automobile's location.
  • a subscribing driver will voice activate the service over a wireless communications system which will respond with real-time reports on traffic and road conditions tailored to the particular location of the automobile of the subscribing driver.
  • the automobile of a subscriber automatically transmits a vehicle rollover condition to the service which will summon help to the automobile's location.
  • a vehicle warning system in a first expression of a first embodiment of the invention, includes a detector, a vehicle position locator, and a communicator.
  • the detector is onboard a first vehicle and automatically detects a travel condition problem encountered by the first vehicle at a first location.
  • the vehicle position locator automatically determines the first location of the first vehicle.
  • the communicator automatically transmits the determined first location and the detected travel condition problem to a second location.
  • a vehicle warning system in a second expression of a first embodiment of the invention, includes a detector, a vehicle position locator, and a communicator.
  • the detector is onboard a first automotive vehicle and automatically detects a loss of traction event encountered by the first vehicle at a first location.
  • the vehicle position locator automatically determines the first location of the first vehicle.
  • the communicator is onboard the first automotive vehicle and transmits the determined first location and the detected low traction event to a communications center remote from the first automotive vehicle.
  • a vehicle warning system in a third expression of a first embodiment of the invention, includes a detector, a vehicle position locator, and a communicator.
  • the detector is onboard a first automotive vehicle and automatically detects a traffic jam event encountered by the first vehicle at a first location.
  • the vehicle position locator automatically determines the first location of the first vehicle.
  • the communicator is onboard the first automotive vehicle and transmits the determined first location and the detected traffic jam to a communications center remote from the first automotive vehicle.
  • a first method of the invention is for warning a second vehicle of a travel condition problem encountered by a first vehicle at a first location.
  • the first method includes steps a) through e).
  • Step a) includes receiving a vehicle operating parameter sensed by a vehicle sensor onboard the first vehicle.
  • Step b) includes identifying a travel condition problem based at least in part on the received vehicle operating parameter.
  • Step c) includes determining the first location of the first vehicle.
  • Step d) includes determining the travel path of the second vehicle.
  • Step e) includes communicating the determined first location and the identified travel condition problem to the second vehicle only when the determined travel path of the second vehicle is headed toward the determined first location.
  • first method and the first, second and third expressions of a first embodiment of the invention are derived from one or more of the first method and the first, second and third expressions of a first embodiment of the invention.
  • an onboard detector such as a vehicle sensor and a computer
  • a communicator to transmit (such as to another vehicle headed toward the particular location) such travel condition problem
  • a roadway or traffic travel condition problem can be quickly reported without requiring human observation or action.
  • only vehicles determined to be headed toward the particular location are alerted of the travel condition problem which reduces unwanted information overload to those vehicles which are not headed toward the particular location.
  • a vehicle warning system 10 includes a detector 12 , a vehicle position locator 14, and a communicator 16.
  • the detector 12 is onboard a first vehicle 18 and automatically detects a travel condition problem encountered by the first vehicle at a first location.
  • a travel condition problem is a problem encountered by the first vehicle which would also affect the travel of other vehicles passing through the first location.
  • the vehicle position locator 14 automatically determines the first location of the first vehicle.
  • the communicator 16 automatically transmits the determined first location and the detected travel condition problem to a second location. It is noted that a communicator 16 is any device which automatically transmits the determined first location and the detected travel condition problem to a second location.
  • Examples, without limitation, of vehicles include automotive vehicles, boats, airplanes, etc.
  • Examples, without limitation, of automotive travel condition problems include loss of traction, an icy roadway (which is a particular loss of traction problem), traffic jams, fog (which is a particular traffic jam problem), etc.
  • Examples of travel condition problems for airplanes include, without limitation, clear air turbulence. Examples of travel condition problems for boats and other vehicles are left to the artisan.
  • the detector itself detects the travel condition problem such as ice formation on a flying aircraft.
  • the detector 12 includes at least one vehicle sensor 20 and a computer 22.
  • the at least one vehicle sensor 20 is onboard the first vehicle 18 and senses a vehicle operating parameter at the first location.
  • a vehicle operating parameter is a parameter which describes the operation of a particular vehicle as opposed to describing the physical environment of the particular vehicle.
  • the computer 22 is onboard the first vehicle 18 and detects the travel condition problem based at least in part on the sensed vehicle operating parameter.
  • the travel condition problem is detected based on a plurality of different vehicle operating parameters, as can be appreciated by the artisan.
  • Examples, without limitation, of automotive vehicle operating parameters include wheel speed for each wheel, brake switch activation, vehicle speed, acceleration, deceleration (which is the negative of acceleration), wheel axle torque, yaw rate, steering wheel angle, wheel slippage, etc.
  • vehicle operating parameters is available from automotive ABS (anti-lock breaking systems) systems, VSE (vehicle stability enhancement) systems, PCM (powertrain control module) systems, BCM (body control module) systems, and/or TCS (traction control system) systems, as is understood by those skilled in the art. Examples of vehicle operating parameters for boats, airplanes and other vehicles are left to the artisan.
  • vehicle position locator 14 is a GPS (global positioning system) system.
  • GPS global positioning system
  • Other examples of vehicle position locators are left to the artisan and include roadway sensors identifying a particular passing automotive vehicle, etc.
  • the first vehicle 18 is a first automotive vehicle.
  • the second location is a second vehicle 24 which is an automotive vehicle in the vicinity of the determined first position.
  • the second location is a programmable highway sign 26, a road crew 28, a radio station 30, or a television station 32.
  • the second location is a communication center 34 remote from the first automotive vehicle 18.
  • the communication center 34 transmits a warning of the detected travel condition problem and the determined first location to the second vehicle 24, the programmable highway sign 26, the road crew 28, the radio station 30, and/or the television station 32.
  • the transmissions are wireless transmissions communicated over a satellite 35. In another design, the transmissions are wireless transmissions communicated locally or even over the Internet.
  • the communicator 16 is an automotive portion of the OnStar Virtual Advisor service or a similar service
  • the communications center 34 is a centralized portion of the OnStar Virtual Advisor service. Other examples of the communicator 16 and the communications center 34 are left to the artisan.
  • the automotive vehicle operating parameter includes wheel speed.
  • the four sensed wheel speeds are compared with the vehicle speed calculated by the computer 22 to determine the amount of wheel slippage wherein the computer 22 detects the travel condition problem of a low traction roadway when the amount of determined wheel slippage exceeds a predetermined value.
  • the vehicle warning system 10 also includes a temperature sensor 36 which is onboard the first vehicle 18 and which measures the air temperature outside the first vehicle 18.
  • the computer 22 detects the travel condition problem of an icy roadway when the computer 22 detects a low traction roadway and the measured air temperature of the temperature sensor 36 is below freezing. Other algorithms to determine a low traction roadway are left to the artisan.
  • the automotive vehicle operating parameter includes wheel speed.
  • vehicle speed is calculated by the computer 22 from one or more of the four sensed wheel speeds.
  • the computer 22 detects the travel condition problem of a traffic jam when the first determined location is along a limited access highway and when the calculated vehicle speed is below a predetermined value for a predetermined time and/or travel distance.
  • the automotive operating parameter includes brake switch activation.
  • the number of brake switch activations and/or the total time of brake switch activation for a predetermined time and/or distance is calculated by the computer 22 .
  • the computer 22 detects the travel condition problem of a traffic jam when the first determined location is along a limited access highway and when the number and/or total time for the brakes exceeds preselected levels.
  • a second expression of the first embodiment of the invention shown in Figure 1 is for a vehicle warning system 10.
  • the vehicle warning system 10 includes a detector 12, a vehicle position locator 14, and a communicator 16.
  • the detector 12 is onboard a first automotive vehicle 18 and automatically detects a loss of traction event encountered by the first vehicle 18 at a first location.
  • the vehicle position locator 14 automatically determines the first location of the first vehicle 18.
  • the communicator 16 is onboard the first automotive vehicle 18 and transmits the determined first location and the detected low traction event to a communications center 34 remote from the first automotive vehicle 18.
  • the detector 12 includes at least one vehicle sensor 20 and a computer 22.
  • the at least one vehicle sensor 20 is onboard the first vehicle 18 and senses a vehicle operating parameter at the first location.
  • the computer 22 is onboard the first vehicle and detects the low traction event based at least in part on the sensed vehicle operating parameter.
  • the vehicle warning system 10 also includes a temperature sensor 36, and the computer 22 determines the low traction event is an icy roadway.
  • the communications center 34 transmits the determined first location and the detected low traction event to other locations 24-32 only when a predetermined number of separate vehicles transmit a low traction event and substantially the same determined first location to the communications center 34.
  • the communications center 34 determines which other automotive vehicles are headed toward the determined first location and transmits the determined first location and the detected low traction event only to those other automotive vehicles which are determined to be headed toward the first location.
  • the communications center 34 (through an associated computer) determines the travel paths of other automotive vehicles identifying their positions to the communications center 34, wherein the communications center 34 broadcasts the warning to those of the other vehicles (such as to the second vehicle 24) whose travel paths are headed to the identified location of the first automotive vehicle 18.
  • the terminology "headed toward” includes heading on the same road toward the location reported by the first vehicle 18 as well as heading along a different road toward an intersection with the reported road or within a predetermined number of intersections, miles, and/or minutes of the reported location.
  • a third expression of the first embodiment of the invention shown in Figure 1 is for an automotive vehicle warning system 10.
  • the automotive vehicle warning system 10 includes a detector 12, a vehicle position locator 14, and a communicator 16.
  • the detector 12 is onboard a first automotive vehicle 18 and automatically detects a traffic jam event encountered by the first vehicle 18 at a first location.
  • the vehicle position locator 14 automatically determines the first location of the first vehicle 18.
  • the communicator 16 is onboard the first automotive vehicle 18 and transmits the determined first location and the detected traffic jam event to a communications center 34 remote from the first automotive vehicle 18.
  • the detector 12 includes at least one vehicle sensor 20 and a computer 22.
  • the at least one vehicle sensor 20 is onboard the first vehicle 18 and senses a vehicle operating parameter at the first location.
  • the computer 22 is onboard the first vehicle and detects the traffic jam event based at least in part on the sensed vehicle operating parameter.
  • the determined first location is along a limited access highway.
  • the communications center 34 transmits the determined first location and the detected traffic jam event to other locations 24-32 only when a predetermined number of separate vehicles transmit a traffic jam event and substantially the same determined first location to the communications center 34.
  • the communications center 34 determines which other automotive vehicles are headed toward the determined first location and transmits the determined first location and the detected traffic jam event only to those other automotive vehicles which are determined to be headed toward the first location.
  • the communications center 34 (through an associated computer) determines the travel paths of other automotive vehicles identifying their positions to the communications center 34, wherein the communications center 34 broadcasts the warning to those of the other vehicles (such as to the second vehicle 24) whose travel paths are headed to the identified location of the first automotive vehicle 18.
  • Step d) is labeled as "Determine Second Vehicle Travel Path” in block 44 of Figure 2.
  • Step d) includes determining the travel path of the second vehicle 24.
  • Step e) is labeled as "Communicate Travel Condition Problem To Second Vehicle” in block 46 of Figure 2.
  • Step e) includes communicating the determined first location and the identified travel condition problem to the second vehicle 24 only when the determined travel path is headed toward the identified location.
  • the first vehicle 18 is a first automotive vehicle and the second vehicle 24 is a second automotive vehicle.
  • vehicle travel paths are determinable by a computer through GPS inputs, as is within the level of skill of the artisan.
  • the intent of the system is to use information from a low traction event (ABS event, TCS event, VSE event, etc.) in conjunction with information from any other in-vehicle sensors (for example, but not limited to acceleration/deceleration, yaw-rate, temperatures, etc.) or other algorithm data, Global Positioning System technology (GPS), and inter-vehicle communications (OnStar or other type of communication) to warn drivers of a possible low traction situation on the road ahead.
  • a driver comes to an icy intersection and hits the brakes.
  • the vehicle enters ABS to try to stop the driver.
  • This data along with data such as deceleration levels from the control algorithm at the time of the stop and outside temperature or other useful information, would be processed by the computer to make an estimate of what surface the driver was on. In this case, the car would probably estimate ice.
  • the vehicle position and direction on the planet would be noted using GPS.
  • the information gathered from this system could then be sent to other cars, via OnStar or other form of inter-vehicle communication, such as satellites, to warn them about the conditions at that site.
  • the signal could also be sent to automated road signs, road maintenance crews, radio stations, or other information system to inform people of the situation.
  • the system would not only work for ABS, but also for TCS and VSE events.
  • Several types of information are used to classify the low-traction condition so that people testing their ABS system, etc. won't set the system off.
  • deceleration was used in conjunction with the ABS data to determine that there was a slippery condition. If someone was just slamming on brakes to test their ABS system, high deceleration levels would indicate that there was enough available traction and not inform other vehicles.
  • the warning that is sent to other vehicles could stay valid for a fixed amount of time after the event happens, or it could stay in effect as long as certain variables exist. For example, as long as the temperature stays below freezing, the signal could warn of ice at the intersection mentioned above, or it could turn off when say five cars don't have a low traction event at that point.
  • the system is used to inform drivers of possible traffic jams by noting the speeds of several other vehicles equipped with the system in the same area. Several vehicles with a speed slower than normal in the same area would indicate a traffic jam.
  • a traffic jam In one example to detect a traffic jam, vehicle speed is monitored as well as the number and/or length of time the brakes are applied. When criteria are satisfied, the system could send out a traffic jam flag. For example, one criteria is for the vehicle to be below 10 mph for 1 ⁇ 2 mile (3 minutes.) and during this time the brake has been applied 15 times or for a total of 1 minute. If several cars in the same area satisfy this criteria, a traffic jam warning is sent to other drivers. One criteria for turning off the warning is when a predetermined number of equipped vehicles pass the same spot without a traffic jam event.
  • Surface estimation can be made by using either an accelerometer or by calculating acceleration from the reference velocities that are calculated in ABS and TCS. By knowing the vehicle acceleration and the fact that the vehicle has lost traction, the system can estimate what surface it is on by using tables, as is known to the artisan.
  • VSE uses a lateral accelerometer at the time the vehicle loses traction and a look up table to estimate the road surface. Using the vehicle speed and the amount of time it took the vehicle to accelerate, stop, or recover could give an estimation of how large the affected area is. Vehicle speed is currently calculated during TCS and ABS events.
  • first method and the first, second and third expressions of a first embodiment of the invention are derived from one or more of the first method and the first, second and third expressions of a first embodiment of the invention.
  • an onboard detector such as a vehicle sensor and a computer
  • a communicator to transmit (such as to another vehicle headed toward the particular location) such travel condition problem
  • a roadway or traffic travel condition problem can be quickly reported without requiring human observation or action.
  • only vehicles determined to be headed toward the particular location are alerted of the travel condition problem which reduces unwanted information overload to those vehicles which are not headed toward the particular location.
EP02078140A 2001-08-28 2002-07-30 Système et méthode d'avertissement pour un véhicule Expired - Lifetime EP1291824B1 (fr)

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US940945 2001-08-28
US09/940,945 US6650252B2 (en) 2001-08-28 2001-08-28 Vehicle warning system and method

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EP1291824B1 EP1291824B1 (fr) 2008-07-09

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US20030043059A1 (en) 2003-03-06

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